ABAP Select data from SAP table HR99S_DOCUMENTS_HISTORY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HR99S_DOCUMENTS_HISTORY table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to HR99S_DOCUMENTS_HISTORY. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the HR99S_DOCUMENTS_HISTORY table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_HR99S_DOCUMENTS_HISTORY TYPE STANDARD TABLE OF HR99S_DOCUMENTS_HISTORY,
      WA_HR99S_DOCUMENTS_HISTORY TYPE HR99S_DOCUMENTS_HISTORY,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <HR99S_DOCUMENTS_HISTORY> TYPE HR99S_DOCUMENTS_HISTORY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HR99S_DOCUMENTS_HISTORY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HR99S_DOCUMENTS_HISTORY
  INTO TABLE IT_HR99S_DOCUMENTS_HISTORY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HR99S_DOCUMENTS_HISTORY
*  INTO TABLE @DATA(IT_HR99S_DOCUMENTS_HISTORY2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_HR99S_DOCUMENTS_HISTORY INDEX 1 INTO DATA(WA_HR99S_DOCUMENTS_HISTORY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HR99S_DOCUMENTS_HISTORY ASSIGNING <HR99S_DOCUMENTS_HISTORY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HR99S_DOCUMENTS_HISTORY>-MOLGA = 1.
<HR99S_DOCUMENTS_HISTORY>-TYPRO = 1.
<HR99S_DOCUMENTS_HISTORY>-GLBID = 1.
<HR99S_DOCUMENTS_HISTORY>-STMOD = 1.
<HR99S_DOCUMENTS_HISTORY>-PERNR = 1.

ENDLOOP.

LOOP AT IT_HR99S_DOCUMENTS_HISTORY INTO WA_HR99S_DOCUMENTS_HISTORY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HR99S_DOCUMENTS_HISTORY-EESID, sy-vline,
  WA_HR99S_DOCUMENTS_HISTORY-BEGDA, sy-vline,
  WA_HR99S_DOCUMENTS_HISTORY-ENDDA, sy-vline,
  WA_HR99S_DOCUMENTS_HISTORY-STATS, sy-vline,
  WA_HR99S_DOCUMENTS_HISTORY-SEQNO, sy-vline,
  WA_HR99S_DOCUMENTS_HISTORY-SDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HR99S_DOCUMENTS_HISTORY you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_HR99S_DOCUMENTS_HISTORY TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_HR99S_DOCUMENTS_HISTORY INTO WA_HR99S_DOCUMENTS_HISTORY.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_HR99S_DOCUMENTS_HISTORY_STR, 
MOLGA TYPE STRING,
TYPRO TYPE STRING,
GLBID TYPE STRING,
STMOD TYPE STRING,
PERNR TYPE STRING,
EESID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
STATS TYPE STRING,
SEQNO TYPE STRING,
SDATE TYPE STRING,
STIME TYPE STRING,
UNAME TYPE STRING,
B2AID TYPE STRING,
TEMSE TYPE STRING,
OPENP TYPE STRING,
ACTDT TYPE STRING,
ADDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HR99S_DOCUMENTS_HISTORY_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_HR99S_DOCUMENTS_HISTORY_STR-MOLGA sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-TYPRO sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-GLBID sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-STMOD sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-PERNR sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-EESID sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-BEGDA sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-ENDDA sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-STATS sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-SEQNO sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-SDATE sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-STIME sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-UNAME sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-B2AID sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-TEMSE sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-OPENP sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-ACTDT sy-vline 
WA_HR99S_DOCUMENTS_HISTORY_STR-ADDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.